doc: add include/dm/device.h to the HTML documentation

Correct Sphinx style comments in include/dm/device.h
and add the driver model device API to the HTML documentation.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

2 files changed, 121 insertions, 93 deletions

diff --git a/doc/api/dm.rst b/doc/api/dm.rst
index 6f72b0b6201..7a77a91c1f9 100644
--- a/doc/api/dm.rst
+++ b/doc/api/dm.rst
@@ -10,3 +10,8 @@ Uclass and Driver
 .. kernel-doc:: include/dm/root.h
 .. kernel-doc:: include/dm/lists.h
 .. kernel-doc:: include/dm/platdata.h
+
+Device
+------
+
+.. kernel-doc:: include/dm/device.h
diff --git a/include/dm/device.h b/include/dm/device.h
index cf785f7ae21..435a1114f1c 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -145,7 +145,7 @@ enum {
  * @uclass_node: Used by uclass to link its devices
  * @child_head: List of children of this device
  * @sibling_node: Next device in list of all devices
- * @flags_: Flags for this device DM_FLAG_... (do not access outside driver
+ * @flags_: Flags for this device `DM_FLAG_...` (do not access outside driver
  *	model)
  * @seq_: Allocated sequence number for this device (-1 = none). This is set up
  * when the device is bound and is unique within the device's uclass. If the
@@ -193,14 +193,14 @@ struct udevice {
 };
 
 /**
- * udevice_rt - runtime information set up by U-Boot
+ * struct udevice_rt - runtime information set up by U-Boot
  *
  * This is only used with OF_PLATDATA_RT
  *
  * There is one of these for every udevice in the linker list, indexed by
  * the udevice_info idx value.
  *
- * @flags_: Flags for this device DM_FLAG_... (do not access outside driver
+ * @flags_: Flags for this device `DM_FLAG_...` (do not access outside driver
  *	model)
  */
 struct udevice_rt {
@@ -239,7 +239,7 @@ static inline void dev_bic_flags(struct udevice *dev, u32 bic)
  * dev_ofnode() - get the DT node reference associated with a udevice
  *
  * @dev:	device to check
- * @return reference of the the device's DT node
+ * Return: reference of the device's DT node
  */
 static inline ofnode dev_ofnode(const struct udevice *dev)
 {
@@ -351,7 +351,7 @@ struct udevice_id {
  * @ops: Driver-specific operations. This is typically a list of function
  * pointers defined by the driver, to implement driver functions required by
  * the uclass.
- * @flags: driver flags - see DM_FLAGS_...
+ * @flags: driver flags - see `DM_FLAGS_...`
  * @acpi_ops: Advanced Configuration and Power Interface (ACPI) operations,
  * allowing the device to add things to the ACPI tables passed to Linux
  */
@@ -378,11 +378,24 @@ struct driver {
 #endif
 };
 
-/* Declare a new U-Boot driver */
+/**
+ * U_BOOT_DRIVER() - Declare a new U-Boot driver
+ * @__name: name of the driver
+ */
 #define U_BOOT_DRIVER(__name)						\
 	ll_entry_declare(struct driver, __name, driver)
 
-/* Get a pointer to a given driver */
+/**
+ * DM_DRIVER_GET() - Get a pointer to a given driver
+ *
+ * This is useful in code for referencing a driver at build time.
+ * Before this is used, an extern U_BOOT_DRIVER() must have been
+ * declared.
+ *
+ * @__name:	Name of the driver. This must be a valid C identifier,
+ * used by the linker_list
+ * Return: struct driver * for the driver
+ */
 #define DM_DRIVER_GET(__name)						\
 	ll_entry_get(struct driver, __name, driver)
 
@@ -392,60 +405,69 @@ struct driver {
  * This is useful in data structures and code for referencing a driver at
  * build time. Before this is used, an extern U_BOOT_DRIVER() must have been
  * declared.
+ * This is like DM_DRIVER_GET, but without the extra code, so it is suitable
+ * for putting into data structures.
  *
- * For example:
- *
- * extern U_BOOT_DRIVER(sandbox_fixed_clock);
+ * For example::
  *
- * struct driver *drvs[] = {
- *	DM_DRIVER_REF(sandbox_fixed_clock),
- * };
+ *   extern U_BOOT_DRIVER(sandbox_fixed_clock);
+ *   struct driver *drvs[] = {
+ *       DM_DRIVER_REF(sandbox_fixed_clock),
+ *   };
  *
- * @_name: Name of the driver. This must be a valid C identifier, used by the
- *	linker_list
- * @returns struct driver * for the driver
+ * @_name:	Name of the driver. This must be a valid C identifier,
+ * used by the linker_list
+ * Return: struct driver * for the driver
  */
 #define DM_DRIVER_REF(_name)					\
 	ll_entry_ref(struct driver, _name, driver)
 
 /**
- * Declare a macro to state a alias for a driver name. This macro will
- * produce no code but its information will be parsed by tools like
- * dtoc
+ * DM_DRIVER_ALIAS() - Declare a macro to state an alias for a driver name
+ *
+ * This macro will produce no code but its information will be parsed by tools
+ * like dtoc
+ *
+ * @__name:	name of driver
+ * @__alias:	alias for the driver name
  */
 #define DM_DRIVER_ALIAS(__name, __alias)
 
 /**
- * Declare a macro to indicate which phase of U-Boot this driver is fore.
- *
+ * DM_PHASE() - Declare a macro to indicate which phase of U-Boot this driver is for.
  *
  * This macro produces no code but its information will be parsed by dtoc. The
  * macro can be only be used once in a driver. Put it within the U_BOOT_DRIVER()
- * declaration, e.g.:
+ * declaration, e.g.::
+ *
+ *   U_BOOT_DRIVER(cpu) = {
+ *       .name = ...
+ *       ...
+ *       DM_PHASE(tpl)
+ *   };
  *
- * U_BOOT_DRIVER(cpu) = {
- *	.name = ...
- *	...
- *	DM_PHASE(tpl)
- * };
+ * @_phase:	Associated phase of U-Boot ("spl", "tpl")
  */
 #define DM_PHASE(_phase)
 
 /**
- * Declare a macro to declare a header needed for a driver. Often the correct
- * header can be found automatically, but only for struct declarations. For
- * enums and #defines used in the driver declaration and declared in a different
- * header from the structs, this macro must be used.
+ * DM_HEADER() - Declare a macro to declare a header needed for a driver.
+ *
+ * Often the correct header can be found automatically, but only for struct
+ * declarations. For enums and #defines used in the driver declaration and
+ * declared in a different header from the structs, this macro must be used.
  *
  * This macro produces no code but its information will be parsed by dtoc. The
  * macro can be used multiple times with different headers, for the same driver.
- * Put it within the U_BOOT_DRIVER() declaration, e.g.:
+ * Put it within the U_BOOT_DRIVER() declaration, e.g.::
+ *
+ *   U_BOOT_DRIVER(cpu) = {
+ *       .name = ...
+ *       ...
+ *       DM_HEADER(<asm/cpu.h>)
+ *   };
  *
- * U_BOOT_DRIVER(cpu) = {
- *	.name = ...
- *	...
- *	DM_HEADER(<asm/cpu.h>)
- * };
+ * @_hdr:	header needed for a driver
  */
 #define DM_HEADER(_hdr)
 
@@ -454,8 +476,8 @@ struct driver {
  *
  * This checks that dev is not NULL, but no other checks for now
  *
- * @dev		Device to check
- * @return platform data, or NULL if none
+ * @dev:	Device to check
+ * Return: platform data, or NULL if none
  */
 void *dev_get_plat(const struct udevice *dev);
 
@@ -464,8 +486,8 @@ void *dev_get_plat(const struct udevice *dev);
  *
  * This checks that dev is not NULL, but no other checks for now
  *
- * @dev		Device to check
- * @return parent's platform data, or NULL if none
+ * @dev:	Device to check
+ * Return: parent's platform data, or NULL if none
  */
 void *dev_get_parent_plat(const struct udevice *dev);
 
@@ -474,8 +496,8 @@ void *dev_get_parent_plat(const struct udevice *dev);
  *
  * This checks that dev is not NULL, but no other checks for now
  *
- * @dev		Device to check
- * @return uclass's platform data, or NULL if none
+ * @dev:	Device to check
+ * Return: uclass's platform data, or NULL if none
  */
 void *dev_get_uclass_plat(const struct udevice *dev);
 
@@ -484,8 +506,8 @@ void *dev_get_uclass_plat(const struct udevice *dev);
  *
  * This checks that dev is not NULL, but no other checks for now
  *
- * @dev		Device to check
- * @return private data, or NULL if none
+ * @dev:	Device to check
+ * Return: private data, or NULL if none
  */
 void *dev_get_priv(const struct udevice *dev);
 
@@ -498,8 +520,8 @@ void *dev_get_priv(const struct udevice *dev);
  *
  * This checks that dev is not NULL, but no other checks for now
  *
- * @dev		Device to check
- * @return parent data, or NULL if none
+ * @dev:	Device to check
+ * Return: parent data, or NULL if none
  */
 void *dev_get_parent_priv(const struct udevice *dev);
 
@@ -508,16 +530,16 @@ void *dev_get_parent_priv(const struct udevice *dev);
  *
  * This checks that dev is not NULL, but no other checks for now
  *
- * @dev		Device to check
- * @return private uclass data for this device, or NULL if none
+ * @dev:	Device to check
+ * Return: private uclass data for this device, or NULL if none
  */
 void *dev_get_uclass_priv(const struct udevice *dev);
 
 /**
- * struct dev_get_parent() - Get the parent of a device
+ * dev_get_parent() - Get the parent of a device
  *
  * @child:	Child to check
- * @return parent of child, or NULL if this is the root device
+ * Return: parent of child, or NULL if this is the root device
  */
 struct udevice *dev_get_parent(const struct udevice *child);
 
@@ -529,13 +551,14 @@ struct udevice *dev_get_parent(const struct udevice *child);
  * returns the associated data value for that compatible string. This is
  * the 'data' field in struct udevice_id.
  *
- * As an example, consider this structure:
- * static const struct udevice_id tegra_i2c_ids[] = {
- *	{ .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
- *	{ .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
- *	{ .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
- *	{ }
- * };
+ * As an example, consider this structure::
+ *
+ *  static const struct udevice_id tegra_i2c_ids[] = {
+ *      { .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
+ *      { .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
+ *      { .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
+ *      { }
+ *  };
  *
  * When driver model finds a driver for this it will store the 'data' value
  * corresponding to the compatible string it matches. This function returns
@@ -544,7 +567,7 @@ struct udevice *dev_get_parent(const struct udevice *child);
  * For USB devices, this is the driver_info field in struct usb_device_id.
  *
  * @dev:	Device to check
- * @return driver data (0 if none is provided)
+ * Return: driver data (0 if none is provided)
  */
 ulong dev_get_driver_data(const struct udevice *dev);
 
@@ -555,7 +578,7 @@ ulong dev_get_driver_data(const struct udevice *dev);
  * driver's operations.
  *
  * @dev:	Device to check
- * @return void pointer to driver's operations or NULL for NULL-dev or NULL-ops
+ * Return: void pointer to driver's operations or NULL for NULL-dev or NULL-ops
  */
 const void *dev_get_driver_ops(const struct udevice *dev);
 
@@ -563,7 +586,7 @@ const void *dev_get_driver_ops(const struct udevice *dev);
  * device_get_uclass_id() - return the uclass ID of a device
  *
  * @dev:	Device to check
- * @return uclass ID for the device
+ * Return: uclass ID for the device
  */
 enum uclass_id device_get_uclass_id(const struct udevice *dev);
 
@@ -573,7 +596,7 @@ enum uclass_id device_get_uclass_id(const struct udevice *dev);
  * This checks that dev is not NULL.
  *
  * @dev:	Device to check
- * @return  pointer to the uclass name for the device
+ * Return:  pointer to the uclass name for the device
  */
 const char *dev_get_uclass_name(const struct udevice *dev);
 
@@ -583,11 +606,11 @@ const char *dev_get_uclass_name(const struct udevice *dev);
  * Returns the numbered child, 0 being the first. This does not use
  * sequence numbers, only the natural order.
  *
- * @dev:	Parent device to check
+ * @parent:	Parent device to check
  * @index:	Child index
  * @devp:	Returns pointer to device
- * @return 0 if OK, -ENODEV if no such device, other error if the device fails
- *	   to probe
+ * Return:
+ * 0 if OK, -ENODEV if no such device, other error if the device fails to probe
  */
 int device_get_child(const struct udevice *parent, int index,
 		     struct udevice **devp);
@@ -619,7 +642,7 @@ int device_get_decendent_count(const struct udevice *parent);
  * @seq: Sequence number to find (0=first)
  * @devp: Returns pointer to device (there is only one per for each seq).
  * Set to NULL if none is found
- * @return 0 if OK, -ENODEV if not found
+ * Return: 0 if OK, -ENODEV if not found
  */
 int device_find_child_by_seq(const struct udevice *parent, int seq,
 			     struct udevice **devp);
@@ -637,7 +660,7 @@ int device_find_child_by_seq(const struct udevice *parent, int seq,
  * @seq: Sequence number to find (0=first)
  * @devp: Returns pointer to device (there is only one per for each seq)
  * Set to NULL if none is found
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int device_get_child_by_seq(const struct udevice *parent, int seq,
 			    struct udevice **devp);
@@ -650,7 +673,7 @@ int device_get_child_by_seq(const struct udevice *parent, int seq,
  * @parent: Parent device
  * @of_offset: Device tree offset to find
  * @devp: Returns pointer to device if found, otherwise this is set to NULL
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int device_find_child_by_of_offset(const struct udevice *parent, int of_offset,
 				   struct udevice **devp);
@@ -665,7 +688,7 @@ int device_find_child_by_of_offset(const struct udevice *parent, int of_offset,
  * @parent: Parent device
  * @of_offset: Device tree offset to find
  * @devp: Returns pointer to device if found, otherwise this is set to NULL
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int device_get_child_by_of_offset(const struct udevice *parent, int of_offset,
 				  struct udevice **devp);
@@ -680,7 +703,7 @@ int device_get_child_by_of_offset(const struct udevice *parent, int of_offset,
  *
  * @node: Device tree ofnode to find
  * @devp: Returns pointer to device if found, otherwise this is set to NULL
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 
 int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
@@ -695,7 +718,7 @@ int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
  *
  * @node: Device tree ofnode to find
  * @devp: Returns pointer to device if found, otherwise this is set to NULL
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
 
@@ -715,7 +738,7 @@ int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
  *
  * @idx: Index number of the driver_info/udevice structure (0=first)
  * @devp: Returns pointer to device if found, otherwise this is set to NULL
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int device_get_by_ofplat_idx(uint idx, struct udevice **devp);
 
@@ -724,7 +747,7 @@ int device_get_by_ofplat_idx(uint idx, struct udevice **devp);
  *
  * @parent: Parent device to search
  * @devp: Returns first child device, or NULL if none
- * @return 0
+ * Return: 0
  */
 int device_find_first_child(const struct udevice *parent,
 			    struct udevice **devp);
@@ -734,7 +757,7 @@ int device_find_first_child(const struct udevice *parent,
  *
  * @devp: Pointer to previous child device on entry. Returns pointer to next
  *		child device, or NULL if none
- * @return 0
+ * Return: 0
  */
 int device_find_next_child(struct udevice **devp);
 
@@ -749,7 +772,7 @@ int device_find_next_child(struct udevice **devp);
  * @parent:	Parent device to search
  * @uclass_id:	Uclass to look for
  * @devp:	Returns device found, if any, else NULL
- * @return 0 if found, else -ENODEV
+ * Return: 0 if found, else -ENODEV
  */
 int device_find_first_inactive_child(const struct udevice *parent,
 				     enum uclass_id uclass_id,
@@ -761,7 +784,7 @@ int device_find_first_inactive_child(const struct udevice *parent,
  * @parent: Parent device to search
  * @uclass_id:	Uclass to look for
  * @devp: Returns first child device in that uclass, if any, else NULL
- * @return 0 if found, else -ENODEV
+ * Return: 0 if found, else -ENODEV
  */
 int device_find_first_child_by_uclass(const struct udevice *parent,
 				      enum uclass_id uclass_id,
@@ -774,7 +797,7 @@ int device_find_first_child_by_uclass(const struct udevice *parent,
  * @name:	Name to look for
  * @len:	Length of the name
  * @devp:	Returns device found, if any
- * @return 0 if found, else -ENODEV
+ * Return: 0 if found, else -ENODEV
  */
 int device_find_child_by_namelen(const struct udevice *parent, const char *name,
 				 int len, struct udevice **devp);
@@ -785,7 +808,7 @@ int device_find_child_by_namelen(const struct udevice *parent, const char *name,
  * @parent:	Parent device to search
  * @name:	Name to look for
  * @devp:	Returns device found, if any
- * @return 0 if found, else -ENODEV
+ * Return: 0 if found, else -ENODEV
  */
 int device_find_child_by_name(const struct udevice *parent, const char *name,
 			      struct udevice **devp);
@@ -798,7 +821,7 @@ int device_find_child_by_name(const struct udevice *parent, const char *name,
  *
  * @parent: Parent to check
  * @devp: Returns child that was found, if any
- * @return 0 on success, -ENODEV if no children, other -ve on error
+ * Return: 0 on success, -ENODEV if no children, other -ve on error
  */
 int device_first_child_ofdata_err(struct udevice *parent,
 				  struct udevice **devp);
@@ -811,7 +834,7 @@ int device_first_child_ofdata_err(struct udevice *parent,
  *
  * @devp: On entry, points to the previous child; on exit returns the child that
  *	was found, if any
- * @return 0 on success, -ENODEV if no children, other -ve on error
+ * Return: 0 on success, -ENODEV if no children, other -ve on error
  */
 int device_next_child_ofdata_err(struct udevice **devp);
 
@@ -822,7 +845,7 @@ int device_next_child_ofdata_err(struct udevice **devp);
  *
  * @parent:	Parent device to search
  * @devp:	Returns device found, if any
- * @return 0 if found, -ENODEV if not, -ve error if device failed to probe
+ * Return: 0 if found, -ENODEV if not, -ve error if device failed to probe
  */
 int device_first_child_err(struct udevice *parent, struct udevice **devp);
 
@@ -833,7 +856,7 @@ int device_first_child_err(struct udevice *parent, struct udevice **devp);
  *
  * @devp: On entry, pointer to device to lookup. On exit, returns pointer
  * to the next sibling if no error occurred
- * @return 0 if found, -ENODEV if not, -ve error if device failed to probe
+ * Return: 0 if found, -ENODEV if not, -ve error if device failed to probe
  */
 int device_next_child_err(struct udevice **devp);
 
@@ -841,7 +864,7 @@ int device_next_child_err(struct udevice **devp);
  * device_has_children() - check if a device has any children
  *
  * @dev:	Device to check
- * @return true if the device has one or more children
+ * Return: true if the device has one or more children
  */
 bool device_has_children(const struct udevice *dev);
 
@@ -849,7 +872,7 @@ bool device_has_children(const struct udevice *dev);
  * device_has_active_children() - check if a device has any active children
  *
  * @dev:	Device to check
- * @return true if the device has one or more children and at least one of
+ * Return: true if the device has one or more children and at least one of
  * them is active (probed).
  */
 bool device_has_active_children(const struct udevice *dev);
@@ -862,7 +885,7 @@ bool device_has_active_children(const struct udevice *dev);
  * view of devices is being displayed.
  *
  * @dev:	Device to check
- * @return true if there are no more siblings after this one - i.e. is it
+ * Return: true if there are no more siblings after this one - i.e. is it
  * last in the list.
  */
 bool device_is_last_sibling(const struct udevice *dev);
@@ -880,7 +903,7 @@ bool device_is_last_sibling(const struct udevice *dev);
  * @dev:	Device to update
  * @name:	New name (this string is allocated new memory and attached to
  *		the device)
- * @return 0 if OK, -ENOMEM if there is not enough memory to allocate the
+ * Return: 0 if OK, -ENOMEM if there is not enough memory to allocate the
  * string
  */
 int device_set_name(struct udevice *dev, const char *name);
@@ -903,7 +926,7 @@ void device_set_name_alloced(struct udevice *dev);
  * @dev:	udevice pointer for which compatible needs to be verified.
  * @compat:	Compatible string which needs to verified in the given
  *		device
- * @return true if OK, false if the compatible is not found
+ * Return: true if OK, false if the compatible is not found
  */
 bool device_is_compatible(const struct udevice *dev, const char *compat);
 
@@ -914,7 +937,7 @@ bool device_is_compatible(const struct udevice *dev, const char *compat);
  * This allows to check whether the machine is comaptible with the compat.
  *
  * @compat:	Compatible string which needs to verified
- * @return true if OK, false if the compatible is not found
+ * Return: true if OK, false if the compatible is not found
  */
 bool of_machine_is_compatible(const char *compat);
 
@@ -922,7 +945,7 @@ bool of_machine_is_compatible(const char *compat);
  * dev_disable_by_path() - Disable a device given its device tree path
  *
  * @path:	The device tree path identifying the device to be disabled
- * @return 0 on success, -ve on error
+ * Return: 0 on success, -ve on error
  */
 int dev_disable_by_path(const char *path);
 
@@ -930,7 +953,7 @@ int dev_disable_by_path(const char *path);
  * dev_enable_by_path() - Enable a device given its device tree path
  *
  * @path:	The device tree path identifying the device to be enabled
- * @return 0 on success, -ve on error
+ * Return: 0 on success, -ve on error
  */
 int dev_enable_by_path(const char *path);
 
@@ -938,7 +961,7 @@ int dev_enable_by_path(const char *path);
  * device_is_on_pci_bus - Test if a device is on a PCI bus
  *
  * @dev:	device to test
- * @return:	true if it is on a PCI bus, false otherwise
+ * Return:	true if it is on a PCI bus, false otherwise
  */
 static inline bool device_is_on_pci_bus(const struct udevice *dev)
 {
@@ -971,7 +994,7 @@ static inline bool device_is_on_pci_bus(const struct udevice *dev)
  *
  * This stops when it gets an error, with @pos set to the device that failed to
  * read ofdata.
-
+ *
  * This creates a for() loop which works through the available children of
  * a device in order from start to end. Device ofdata is read by calling
  * device_of_to_plat() on each one. The devices are not probed.
@@ -1012,7 +1035,7 @@ static inline bool device_is_on_pci_bus(const struct udevice *dev)
  * be bound.
  *
  * @dev:	Device to scan
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int dm_scan_fdt_dev(struct udevice *dev);